[英]Programmatically Change Gradient Background of Widget
我想要完成的事情:
int[] colors = new int[]{colorDark,colorLight}
GradientDrawable gd = new GradientDrawable(TOP_BOTTOM, colors);
remoteView.setBackgroundDrawable(gd); //method does not exist
顯然這是不可能的。
我怎么能做到這一點? (如果它是可能的)
我不想在xml文件中為不同的顏色創建多個形狀,因為這限制了選項。
我已經嘗試將我的drawable轉換為位圖並調用setImageViewBitmap
。 我使用此代碼轉換並使用此代碼獲取寬度/高度,但我無法填充窗口小部件(此外,設備的顯示寬度/高度確實不是我需要的)
我只是在猜測。 您可以嘗試擴展RemoteView並覆蓋apply函數:
public class MySpecialRemoteViews extends RemoteViews {
//add the Constructors
public View apply(Context context, ViewGroup parent) {
View result = super.apply(context, parent);
//your code
int[] colors = new int[]{colorDark,colorLight}
GradientDrawable gd = new GradientDrawable(TOP_BOTTOM, colors);
result.setBackgroundDrawable(gd);
//end of your code
return result;
}
}
use following class
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Shader;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.StateListDrawable;
import android.graphics.drawable.shapes.RoundRectShape;
import android.view.View;
public class UtilForGradientBackground {
public static void gradientBgCreatorFromHex(View view, String bgColorHex, String gradColorHex) {
ColorDefinitionResult bgColor = getArgbFromHexaString(bgColorHex);
ColorDefinitionResult gradientColor = getArgbFromHexaString("1b6da7");
CreateGradientBackground(view, bgColor, gradientColor);
}
public static void CreateGradientBackground(View view, ColorDefinitionResult bgColor, ColorDefinitionResult gradientColor) {
int argbBgColor = Color.argb((int) bgColor.Alpha, bgColor.Red, bgColor.Green, bgColor.Blue);
int argbGradient = Color.argb((int) gradientColor.Alpha, gradientColor.Red, gradientColor.Green, gradientColor.Blue);
final Shader upperShader = new LinearGradient(0, 0, 0, 40, argbBgColor, argbGradient, Shader.TileMode.CLAMP);
float[] roundedCorner = new float[] { 0, 0, 0, 0, 0, 0, 0, 0 };
ShapeDrawable normal = new ShapeDrawable(new RoundRectShape(roundedCorner, null, null));
normal.getPaint().setShader(upperShader);
normal.setPadding(7, 3, 7, 0);
StateListDrawable stateList = new StateListDrawable();
stateList.addState(new int[] {}, normal);
view.setBackgroundDrawable(stateList);
}
public static ColorDefinitionResult getArgbFromHexaString(String hexColorString) {
ColorDefinitionResult colorDefinitionResult = new ColorDefinitionResult();
if (hexColorString.length() == 6) {
String redHex = hexColorString.substring(0, 2);
String greenHex = hexColorString.substring(2, 4);
String blueHex = hexColorString.substring(4, 6);
colorDefinitionResult.Red = Integer.parseInt(redHex, 16);
colorDefinitionResult.Green = Integer.parseInt(greenHex, 16);
colorDefinitionResult.Blue = Integer.parseInt(blueHex, 16);
colorDefinitionResult.Alpha = 255;
}
return colorDefinitionResult;
}
}
and use it as follow:
give it your View id and RGB values as arguments
View findViewById = findViewById(R.id.your_view_id);
UtilForGradientBackground.gradientBgCreatorFromHex(findViewById, "2E64FE", "819FF7");
一段時間沒有完成RemoteViews:
您是否可以添加具有采用單個字符串的方法的自定義視圖。 然后你可以使用RemoteViews.setString調用這個方法,這個方法可以解析字符串中的數字並將其作為背景應用。
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